graphs in math
posted by Pam .
C varies inversely as J. If C = 7 when J = 0.7, determine C when J = 12

graphs in math 
Reiny
C varies inversely as J > C = k(1/J) , where k is a constant
when C=7, J=.7
7 = k(1/.7)
k = 4.9
so C = 4.9/J
when J=12
C = 4.9/12 = .408333..
or:
C1/C2 = J2/J1
7/C2 = 12/.7
12C2 = 7(.7)
C2 = 7(.7)/12 = .408333..
notice the actual calculations are of course the same.
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